# std::counting_semaphore<LeastMaxValue>::max

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< cpp‎ | thread‎ | counting semaphore

constexpr std::ptrdiff_t max() noexcept; |  | (since C++20)

Returns the internal counter's maximum possible value, which is greater than or equal to `LeastMaxValue`.

### Return value

The internal counter's maximum possible value, as a std::ptrdiff_t.

### Notes

For specialization `binary_semaphore`, `LeastMaxValue` is equal to 1.

As its name indicates, the `LeastMaxValue` is the minimum max value, not the actual max value. Thus max() can yield a number larger than `LeastMaxValue`.

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